JPH04236112A - Drip-proof structure of duct for indoor wiring - Google Patents

Abstract

PURPOSE:To prevent the entering of rain water into a duct provided on the periphery of a hole section from the hole section by providing a first projecting section formed to a bank-like shape protruding from the upper surface of the duct and the second projecting section protruding from the lower surface of a lid to the opposite side of the hole section of the first projecting section to the first projecting section. CONSTITUTION:The first projecting section 12 is formed on the periphery of a hole section 2 in the ceiling section of a duct 11 so that the entering of rain water falling on the upper surface of the duct 11 into the duct 11 can be prevented. In addition, the second projecting section 13 which is faced to the section 12 from the opposite side of the hole section 2 of the section 12 is formed from the lower surface of a lid 14 to the section 12. The rain water coming down to the lower end of the section 13 is made to fall on the side of the duct 11 opposite to the hole section 2 of the first projecting section 12 and the entering of the rain water into the duct 11 is prevented.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention is directed to a longitudinal wall in which a charging conductor, which is an electric wire that is wired indoors and supplies high-voltage power to a switchboard, etc., is housed, and a hole is formed in the ceiling that penetrates inside and out in the vertical direction. The present invention relates to a drip-proof structure for an indoor wiring duct that prevents rainwater from entering a horizontally oriented tubular duct through holes.

0002

[Prior Art] A charging conductor, which is an electric wire that is wired indoors and supplies high-voltage power to a switchboard, etc., is usually housed in a horizontally oriented tubular duct with a vertically penetrating hole formed in the ceiling. . The conventional drip-proof structure of indoor wiring ducts prevents rainwater from entering the duct through the hole.The hole is covered from above with a lid, and the lid and duct are screwed together with packing material sandwiched between the joints. Generally, rainwater can enter through gaps that form at the joint between the lid and duct, or through screw holes between the lid and duct due to aging of the packing. The drip-proof structure of this type of indoor wiring duct is shown in Figures 3 and 4. FIG. 3 is a front vertical cross-sectional view showing a drip-proof structure of a conventional indoor wiring duct, and FIG. 4 is a side vertical cross-sectional view of FIG. 3, with the left side of the figure being the front side.

In FIGS. 3 and 4, reference numeral 1 denotes a rectangular tubular duct whose longitudinal direction is horizontal and which has holes 2 formed in the ceiling and bottom that penetrate inside and outside in the vertical direction.
Inside, the upper end of an insulator 4, which is installed in parallel in the longitudinal and width directions of the duct 1 and whose lower end is supported by a pedestal 3 fixed to the bottom of the duct 1, is connected to a high-voltage insulator 4 that is wired indoors and connected to a switchboard (not shown). Charging conductor 5, which is an electric wire that supplies power
A plurality of ducts are installed in parallel in the width direction of the duct 1. On the other hand, the hole 2 in the ceiling of the duct 1 is sealed by attaching a flat cover 6 to the duct 1 with a packing material 7 at the joint between the cover 6 and the duct 1, and screwing it to the duct 1 with screws 8. A drip-proof structure of the indoor wiring duct is configured to prevent rainwater from entering into the interior of the duct from the hole 2. The screw hole 9 formed in the duct 1 and the lid 6 through which the screw 8 is passed communicates with the inside and outside of the duct 1, and the hole 2 at the bottom of the duct 1 allows the flat lid 6 to be inserted into the duct 1 with the screw 8. It is closed by screwing, and flanges 10 are formed at both left and right ends of the duct 1 so that the length of the duct 1 can be adjusted by adding the duct 1 according to the length of the charging conductor 6.

0004

[Problems to be Solved by the Invention] By the way, such a conventional drip-proof structure of an indoor wiring duct is difficult to avoid due to gaps or screws that occur at the joint between the lid 6 and the duct 1 due to aging of the packing material 7. Rainwater may enter through holes 9, etc. Therefore, this rainwater that has entered can cause the charging conductor 5 to
There is a risk of short-circuiting between the two, causing a short-circuit accident, and there is a problem of lack of reliability.

[0005] An object of the present invention is to provide a drip-proof structure for an indoor wiring duct that is safe and highly reliable and prevents rainwater from entering the duct through holes, screw holes, etc.

[0006]

[Means for Solving the Problems] In order to solve the above problems, according to the present invention, a charging conductor, which is an electric wire that is wired indoors and supplies high-voltage power to a switchboard, etc., is accommodated in the ceiling, and the charging conductor is installed inside and outside in the vertical direction. For indoor wiring, the duct has a drip-proof structure with a horizontally oriented tubular duct in which a through hole is formed, and the hole is covered from above with a lid to seal the duct to prevent rainwater from entering the duct. In the drip-proof structure of the duct, a first protrusion formed in the duct at the peripheral edge of the hole protrudes upward from the upper surface of the duct in a bank shape; and a second protrusion formed to face the hole from the opposite side and protrude downward from the lower surface of the lid.

[0007] In addition to the above, first protrusions are formed in the duct on both sides of the hole in the longitudinal direction of the duct, at the peripheral edge of the hole, over the entire width of the duct. .

Furthermore, in addition to the above, in the width direction of the duct,
The lid is screwed to the duct at its end portions that protrude laterally from both outer surfaces of the duct.

[0009]

[Operation] This invention is a duct that is horizontally oriented in the longitudinal direction and has a hole in the ceiling that penetrates inside and out in the vertical direction, and houses a charging conductor, which is an electric wire that is wired indoors and supplies high-voltage power to a switchboard, etc. , a first protrusion formed in the duct at the peripheral edge of the hole protrudes upward from the upper surface of the duct in the shape of a bank, and the first protrusion is connected to the hole of the first protrusion. Since the second protruding part is formed facing from the opposite side and protruding downward from the lower surface of the lid, the first protruding part acts as a dam, and rainwater dripping or adhering to the upper surface of the duct is removed from the first protruding part. It cannot get over the protrusion and will not enter the duct through the gap between the lid and the duct. In addition, rainwater that drips or adheres to the top surface of the lid, runs along its outer circumferential surface, and reaches the bottom surface of this lid, is prevented from flowing along the bottom surface of the lid and entering the duct through the gap between the lid and the duct through the second protrusion. , and drips from the lower end of the second protrusion onto the upper surface of the duct on the opposite side from the hole of the first protrusion.

In addition to the above, the first protrusions are formed in the duct on both sides of the hole in the longitudinal direction of the duct, at the peripheral edge of the hole, over the entire width of the duct. The first protrusion acts as a dam, and all the rainwater dripping or adhering to the top surface of the duct cannot get over the first protrusion and cannot enter the duct through the gap between the lid and the duct.

Furthermore, in addition to the above, in the width direction of the duct,
This lid is screwed to the duct at the ends of the lid that protrude laterally from both outer surfaces of the duct.
The screw holes formed in the lid and the duct, through which the screws pass, do not communicate with the inside and outside of the duct, and rainwater that drips or adheres to the top surface of the duct and enters the screw holes does not enter the duct.

0012

Embodiments Hereinafter, embodiments of the present invention will be explained based on FIGS. 1 and 2. FIG. 1 is a front vertical cross-sectional view showing a drip-proof structure of an indoor wiring duct according to an embodiment of the present invention, and FIG. 2 is a side vertical cross-sectional view of FIG. 1, with the left side of the figure being the front side. Components common or identical to those in FIGS. 3 and 4 are designated by the same reference numerals.

In FIGS. 1 and 2, reference numeral 11 denotes a rectangular tubular duct whose longitudinal direction is horizontal and which has holes 2 formed in the ceiling and bottom that penetrate inside and outside in the vertical direction.
Inside the duct 11, a high-voltage wire is connected to the upper end of the insulator 4, which is installed in parallel in the longitudinal and width directions of the duct 11 and whose lower end is supported on the upper end of the pedestal 3 fixed to the bottom of the duct 11. A plurality of charging conductors 5, which are electric wires for supplying electric power, are installed in parallel in the width direction of the duct 11. On the other hand, a hole 2 is formed in the ceiling of the duct 11,
The duct 11 of this hole 2, which is the peripheral edge of this hole 2
First protrusions 12 projecting upward from the upper surface of the duct 11 in the shape of a bank are formed on both sides of the duct 11 in the longitudinal direction over the entire width of the duct 11. A second protrusion 13 is formed in the first protrusion 12 from the side opposite to the hole 2 of the first protrusion 12 and protrudes downward from the lower surface, and a vertical cross section is formed in the left and right center portions. The hole 2 is covered from above with a lid 14 which is bent downward into a concave U-shape to increase the section modulus in the front-rear direction. Also,
A lid 1 protruding from the front and rear sides of the duct 11 in the front and rear direction
The lid 14 is screwed to the duct 11 at both front and rear end portions of the lid 4 with screws 8. Note that there is also a hole 2 at the bottom of the duct 11.
This hole 2 is inserted into the flat cover 6 with a screw 8.
The duct 11 is screwed to the duct 11 to close it from below, and flanges 10 are formed at both left and right ends of the duct 11 so that the length of the duct 11 can be adjusted by adding a duct 11 according to the length of the charging conductor 6. .

In the above structure, the drip-proof structure of the indoor wiring duct of the present invention is such that the first protrusion 12 formed at the periphery of the hole 2 in the ceiling of the duct 11 acts as a dam, and the duct 11 Rainwater dripping or adhering to the upper surface of the duct 11 is prevented from entering the duct 11 through the hole 2 through the gap between the lid 14 and the duct 11. Further, a second protrusion 13 is formed on the first protrusion 12 from the side opposite to the hole 2 of the first protrusion 12 and protrudes downward from the lower surface of the lid 14. The rainwater that has flowed along the outer circumferential surface of the lid 14 to the lower end of the duct 13 is drained into the hole 2 of the first protrusion 12 of the duct 11.
This prevents rainwater dripping or adhering to the top surface of the lid 14 from entering the duct 11 through the hole 2 through the gap between the lid 14 and the duct 11. Therefore, even if there is a gap between the lid 14 and the duct 11, rainwater will not enter the duct 11 through the hole 2, so there is no need to seal the gap between the lid 14 and the duct 11 with packing material. Rainwater does not enter into the duct 11 through the gap between the lid 14 and the duct 11, which occurs due to aging of the packing material. In addition, the front and rear end portions of the lid 14 that protrude sideways from both outer surfaces of the duct 11 in the front and rear direction, which is the width direction of the duct 11, are attached to the duct 11 with screws 8.
Since the lid 14 is fixed to the duct 11 by screwing it, the screw holes 9 formed in the lid 14 and the duct 11 through which the screws 8 are passed do not communicate with the inside and outside of the duct 11. Rainwater dripping or adhering to the upper surface of the duct 14 is prevented from entering the duct 11. Furthermore, duct 11
Since the section modulus of the lid 14 in the front-rear direction, which is the width direction, is increased, the number of screws 8 for tightening the lid 14 to the duct 11 is also reduced by half compared to the conventional one.

[0015]

[Effects of the Invention] According to the present invention, a longitudinal hole is formed in the ceiling to house a charging conductor, which is an electric wire that is wired indoors and supplies high voltage power to a switchboard, etc., and that penetrates inside and out in the vertical direction. A first protrusion formed in the duct at the periphery of the hole of the horizontally oriented tubular duct projects upwardly from the upper surface of the duct in the shape of a bank; Since the second protrusion is provided opposite to the hole and protrudes downward from the lower surface of the lid, rainwater dripping or adhering to the upper surface of the duct can be drained from the gap between the lid and the duct into the duct. It does not invade inside. Further, the second protrusion prevents rainwater dripping or adhering to the top surface of the lid from coming to the bottom surface of the lid from the gap between the lid and the duct and dripping into the hole.

In addition to the above, the first protrusions are formed on the duct at the periphery of the hole on both sides of the hole in the longitudinal direction of the duct, extending over the entire width of the duct. All rainwater dripping or adhering to the top surface of the duct will no longer enter the duct through the gap between the lid and the duct.

Furthermore, in addition to the above, in the width direction of the duct,
This lid is screwed to the duct at the ends of the lid that protrude laterally from both outer surfaces of the duct.
Rainwater that has entered the screw holes will not enter the duct.

As a result, rainwater that adheres to or drips on the top surface of the duct and the lid will not enter the duct through the holes or enter the duct through the screw holes, resulting in safety and reliability. The effect is that a drip-proof structure for indoor wiring ducts with a high level of resistance can be provided at a low cost.

[Brief explanation of the drawing]

[Fig. 1] A front vertical sectional view showing a drip-proof structure of an indoor wiring duct according to an embodiment of the present invention.

[Figure 2] Side longitudinal cross-sectional view of Figure 1

[Figure 3] Front vertical cross-sectional view showing the drip-proof structure of a conventional indoor wiring duct

[Figure 4] Side longitudinal cross-sectional view of Figure 3

[Explanation of symbols]

1 Duct 2 Hole 3. Mounting frame 4 Insulator 5 Charging conductor 6 Lid 7 Packing material 8 Screw 9 Screw hole 10 Flange 11 Duct 12 First protrusion 13 Second protrusion 14 Lid

Claims (3)

[Claims] Claim 1: A shield for a horizontally oriented tubular duct that houses a charging conductor, which is an electric wire that is wired indoors and supplies high-voltage power to a switchboard, etc., and has a hole in the ceiling that penetrates inside and out in the vertical direction. In the drip-proof structure of an indoor wiring duct, which has a drip-proof structure and seals the hole by covering it from above with a lid to prevent rainwater from entering the duct, A first protrusion formed in a bank-like manner protrudes upward from the upper surface of the duct; A drip-proof structure for an indoor wiring duct, comprising: a second protruding portion formed protrudingly from the duct. 2. In the drip-proof structure of an indoor wiring duct according to claim 1, the first protruding portion is provided on both sides of the hole in the longitudinal direction of the duct, at the periphery of the hole. Drip-proof structure for indoor wiring ducts formed along the entire length. 3. In the drip-proof structure of an indoor wiring duct according to claims 1 and 2, the lid is located at the ends of the lid that protrude laterally from both outer surfaces of the duct in the width direction of the duct. A drip-proof structure for an indoor wiring duct that is screwed to the duct.